冲激信号SAR反向投影成像方法I、Q实现  

Back Projection Imaging I、Q Realization of Impulse Signal SAR

作　　者：粟毅[1] 梁甸农[1] 

机构地区：[1]国防科技大学电子技术系

出　　处：《国防科技大学学报》1998年第2期65-68,共4页Journal of National University of Defense Technology

基　　金：国家自然科学基金

摘　　要：本文在分析冲激信号成像特点的基础上，说明了线阵模型是解释冲激信号ＳＡＲ成像过程的有效方法，给出了冲激信号ＳＡＲ反向投影（ＢＰ）方法，针对系统实现问题，提出了对Ｉ、Ｑ两路信号分别积累，求模的ＢＰＩＱ法，并以计算机仿真及与常规的ＢＰ作比较，最后给出了一些有用的结论。The characteristics of impulse signal synthetic aperture radar(SAR)imaging are analyzed in this paper.It is shown that the linear array model is an efficient interpretation to the azimuth integration of an impulse SAR.Back projection(BP)method can be comprehended easily with a linear array model.With respect to the algorithm realization in a field system,the BPIQ method with back projection to I,Q channels respectively and then evaluating the module of two integration's is presented.Computer simulations show that the imaging results of BPIQ are better than those of the ordinary BP algorithm.

关 键 词：冲激信号 合成孔径 成像 反向投影 机载雷达 

分 类 号：TN959.73[电子电信—信号与信息处理]